To further understand the high-frequency character of it-modes, according tothe matching conditions of electromagnetic fields, a cold dispersion relation is derived bysolving Maxwell? equations for the fields in an equivalent periodic structure.
为了进一步了解分离腔中反向π模场的高频特性，我们从麦克斯韦方程组出发，运用电磁场的匹配条件，推导出分离腔的色散关系及场分布表达式。
参考来源 - C波段双间隙输出腔的理论分析和实验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Results The coincidence of high-frequency ultrasound examination with tumor's physical character attained 100% and in differential diagnosis of benign or malignant tumors was 87.4%.
结果高频超声在肿块的物理性质诊断方面符合率达100%，在肿块良恶性鉴别诊断方面符合率为87.4%。
The noise from injection and bubbling has the character of wide frequency band and high noise level.
喷注与鼓泡产生的噪声具有频带宽、声压级较高的特征。
As a whole, the character of geological disasters in Liaoning province is high in frequency, widespread in distribution, much in type and large in destructive action.
归结起来，辽宁的地质灾害有分布面广、类型多、灾害频繁和破环性大等特点。
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